compromise/src/term/verb/conjugate/generic.js

natural language processing in the browser

'use strict';
//non-specifc, 'hail-mary' transforms from infinitive, into other forms
const fns = require('./paths').fns;

const generic = {

  Gerund: (o) => {
    let inf = o.Infinitive;
    if (fns.endsWith(inf, 'e')) {
      return inf.replace(/e$/, 'ing');
    }
    return inf + 'ing';
  },

  PresentTense: (o) => {
    let inf = o.Infinitive;
    if (fns.endsWith(inf, 's')) {
      return inf + 'es';
    }
    if (inf.match(/[bcdfghjklmnpqrstvwxz]y$/)) {
      return inf.slice(0, -1) + 'ies';
    }
    return inf + 's';
  },

  PastTense: (o) => {
    let inf = o.Infinitive;
    if (fns.endsWith(inf, 'e')) {
      return inf + 'd';
    }
    if (fns.endsWith(inf, 'ed')) {
      return inf;
    }
    if (inf.match(/[bcdfghjklmnpqrstvwxz]y$/)) {
      return inf.slice(0, -1) + 'ied';
    }
    return inf + 'ed';
  },

  FutureTense: (o) => {
    return 'will ' + o.Infinitive;
  },

  PerfectTense: (o) => {
    return 'have ' + (o.Participle || o.PastTense);
  },

  Pluperfect: (o) => {
    if (o.PastTense) {
      return 'had ' + o.PastTense;
    }
    return null;
  },
  FuturePerfect: (o) => {
    if (o.PastTense) {
      return 'will have ' + o.PastTense;
    }
    return null;
  }

};

module.exports = generic;